<table class="table">
    <tr>
      <th><input type="text" name="search_key" class="form-control"></input></th>
      <th><input type="submit" class="btn btn-primary" value="搜索"></input></th>
      <th><p style="text-align:right; font-size: 20px;"><a href="form.html">添加新用户</a></p></th>
    </tr>
  </table>